How to Send a Letter: Format & Mailing Steps

Writing and sending a physical letter is still a useful skill for thank-you notes, formal complaints, or business correspondence. This guide walks you through the correct format for a professional letter, how to address the envelope, and how to mail it so it arrives without problems. Before you begin, gather your letter content, a pen or printer, an envelope, a stamp, and the recipient’s full address.

What You’ll Need

• Paper (standard 8.5″ x 11″ or A4)
• Envelope (matching size)
• Pen or printer
• Postage stamp (correct value for weight and destination)
• Recipient’s full mailing address
• Your return address

Step-by-Step

1. Format your letter properly. Use a standard business letter layout: your contact information at the top left (name, address, phone, email), then the date, then the recipient’s name and address, then a salutation like “Dear Mr. Smith:” followed by a colon (formal) or comma (casual). Use single spacing with a blank line between paragraphs, and align everything left.
2. Write a clear subject line (optional). For formal letters, add a subject line after the salutation, e.g., “Re: Invoice #1234”. This helps the recipient understand the purpose immediately.
3. Compose the body. Keep it concise. In the first paragraph, state your purpose. In the middle paragraphs, provide details. In the final paragraph, state what you expect (e.g., a response by a certain date) and thank the reader.
4. Close the letter. Use a closing like “Sincerely,” or “Best regards,” followed by your signature (if printing, leave four blank lines for a handwritten signature) and your typed name. If you enclose something, write “Enclosure” below your name.
5. Print or write neatly. Use black or blue ink if handwritten. If printing, choose a readable font like Times New Roman or Arial, 11 or 12 point.
6. Fold the letter. For a standard #10 envelope (4 1/8″ x 9 1/2″), fold the letter in thirds: fold the bottom up to one-third, then fold the top down to meet the crease. For a smaller envelope, fold in half horizontally.
7. Address the envelope. Write or print the recipient’s address in the center, slightly lower than the middle. Use this format:
   
   Recipient Name
   Street Address
   City, State ZIP Code
   Country (if international)
8. Add your return address. Place your own address in the upper-left corner. This ensures the letter can be returned if undeliverable.
9. Affix the stamp. Place the stamp in the upper-right corner. Make sure it’s the correct postage for the size, weight, and destination. If unsure, check with your postal service or weigh the envelope.
10. Mail the letter. You can drop it in a mailbox, hand it to a postal carrier, or take it to a post office. For important letters, consider using certified mail or tracking.

Common Mistakes

• Using incorrect postage – letters that are too heavy or oversized need extra stamps.
• Writing the address in the wrong place – the recipient’s address must be centered, not on the right or left edge.
• Forgetting the return address – if the letter is undeliverable, it will be lost.
• Using a salutation like “To Whom It May Concern” when you know the person’s name – always use the name if possible.
• Not signing the letter – a typed name alone is impersonal.
• Folding the letter incorrectly – it may not fit or may be damaged in processing.

Tips

• Use a ruler to fold the letter neatly – crisp folds look professional.
• Double-check the spelling of the recipient’s name and address.
• If you’re sending internationally, write the country name in capital letters on the last line.
• For formal letters, use a plain white or cream paper and envelope.
• Keep a copy of important letters for your records.
• If you’re using a window envelope, ensure the address shows through correctly.

Troubleshooting

• Letter returned to you: Check the address for errors. If the recipient moved, try finding a new address. If the postage was insufficient, add the missing amount and resend.
• Letter never arrives: Wait at least 7-10 business days for domestic mail, longer for international. If it’s urgent, consider sending a duplicate via certified mail.
• Envelope is too small: Use a larger envelope. Standard letters should be at least 3.5″ high and 5″ long.
• Stamp falls off: Use a damp sponge or glue stick to ensure it’s firmly attached. Alternatively, use self-adhesive stamps.
• Ink smudges: If handwriting, use a pen with quick-drying ink. If printing, let it dry completely before folding.

Template

Frequently Asked Questions

Do I need to use a specific font for a formal letter?

Use a simple, readable font like Times New Roman, Arial, or Calibri in 11 or 12 point. Avoid decorative fonts.

Can I email a letter instead of mailing it?

Yes, but some formal correspondence still requires a physical signature. For legal documents, check if a physical copy is required.

How many stamps do I need for a standard letter?

In the US, one First-Class stamp covers a standard 1-ounce letter. Heavier letters need extra postage. Check your postal service’s rates.

What is the best way to fold a letter for a business envelope?

Fold the bottom third up, then fold the top third down. This creates a neat, uniform fold that fits standard #10 envelopes.

Should I use a colon or comma after the salutation?

In formal business letters, use a colon (Dear Mr. Smith:). In informal or personal letters, a comma is acceptable.

What if I don’t know the recipient’s name?

Use a generic salutation like “Dear Hiring Manager” or “Dear Customer Service Team.” Avoid “To Whom It May Concern” if possible.

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